'''Basic Trope''': One character falls in love with another who doesn't return the feelings due only to having a different sexual orientation.
* '''Straight''': [[SingleWomanSeeksGoodMan Alice]] has a crush on the [[StraightGay seemingly straight, but actually totally gay Bob]], who is already in a relationship with [[CampGay Charles]].
* '''Exaggerated''':
** [[ExtremeOmnisexual Promiscuous and pansexual Alice]] is taken with [[UsefulNotes/{{Asexuality}} asexual Bob]].
** [[AllLoveIsUnrequited No potential couples in the show have compatible orientations]].
** [[LoveDodecahedron Alice is straight and in love with Bob, who is gay and in love with Charles, who is straight and in love with Diane, who is gay and in love with Alice]].
** Alice is so straight as to be [[HeteronormativeCrusader homophobic towards]] [[FemaleMisogynist other women]], while Bob is about as CampGay as you can get and [[BerserkButton cannot stand when straight women, not even slightly flirt with him]]. Alice is in love with Bob.
** Alice is a bi woman who falls in love with every gay man, straight woman, and UsefulNotes/{{aromantic}} or asexual person she sees.
** The completely straight Alice OnlyHasSameSexAdmirers, meanwhile, the gold-star lesbian Diane is a DudeMagnet.
** Alice is so straight as to be [[HeteronormativeCrusader homophobic towards]] [[FemaleMisogynist other women]], but she outright repulses all heterosexual men who express attraction toward her, and she falls in love with every gay man she see (likewise, they may be so put off by any heterosexual woman, let alone Alice, that they're already planning to make an entire country or even planet all to themselves).
* '''Downplayed''':
** Alice is sexually attracted to Bob who, while heteromantic, doesn't experience sexual attraction.
** [[HopelessSuitor Alice]] is sexually attracted to Bob, a [[ButNotTooBi bisexual]] man, even though [[YoureNotMyType she isn't a kind of woman that turns Bob on at all]].
* '''Justified''':
** Bob just doesn't like girls. Some people don't. TruthInTelevision.
** Bob and Charles' [[LoveTriangle love rivalry]] is a facade. When they are both flirting with Alice at the same time, they are actually flirting with eachother.
** Alice assumes Bob's fixation with her is attraction, not frustration that his object of affection is attracted to her.
* '''Inverted''':
** EveryoneIsBi.
** IfItsYouItsOkay.
* '''Subverted''':
** Alice falls for Bob, but once he introduces her to his bisexual boyfriend Charles, Alice and Charles hook up.
** Alice manages to [[CureYourGays make Bob and Charles heterosexual]] with AppliedPhlebotinum.
** Alice gets gender-swapped or a sex change, and becomes "Albert". However, she (now he) still has the mind/sexuality of a straight girl, despite the fact that Alice is now a guy, which technically makes "Albert" a gay man, [[JumpingTheGenderBarrier perfect for Bob]]!
** Bob was in a relationship with Charles, but they break up for some reason unrelated to sexual orientation. Alice is then surprised when Bob pursues her — turns out Bob is bi.
** Alice falls for Bob, who is asexual. Alice is then surprised when Bob reciprocates -- turns out Bob is asexual, but not aromantic...
* '''Double Subverted''':
** ... But it turns out Charles was only trying to make Bob jealous, and [[SettledForGay isn't really attracted to Alice]].
** ...Except it turns out they were faking it, and get the next ride out of town to get away from an obvious {{Yandere}}.
** ...Now, Albert must face with Diane, a straight woman who madly falls for him. Or even "worse", [[AttractiveBentGender Albert]] becomes a ChickMagnet who has to deal with loads of swooning girls!
** ...And Bob is homoromantic.
* '''Parodied''': Alice is a [[SingleTargetSexuality Bob-sexual]] and Bob is an [[SleepsWithEveryoneButYou everyone-but-Alice-sexual]].
* '''Zig Zagged''':
** Alice is rejected by Bob, who tells her SorryImGay. However, it turns out that Bob isn't actually gay and has just taken a vow of chastity. Alice is satisfied with a platonic relationship with Bob, until she finds out that Bob has been sleeping with Charles. Bob apologizes and attempts make-up sex with Alice, who is now dating Diane.
** Alice tries to seduce Diane who gently tells her that she's heterosexual, but as Alice is leaving [[TheGadfly Diane]] adds that she's a [[ExactWords bi-romantic heterosexual]], and gives her her number. However, Alice then mentions she's a hetero-romantic bisexual who is looking for a one-night-stand. Then Bob walks in looking for ''both'' a relationship and a one-night-stand, and the meeting results in a threesome and a polyamorous FriendsWithBenefits relationship between all three.
* '''Averted''':
** NoHuggingNoKissing.
** Everyone is sexually compatible with the person they fall in love with.
** The sexuality incompatibility doesn't prevent Bob from entering a relationship with Alice.
* '''Enforced''':
** The author created Alice and Bob as a way to inform the audience about sexuality issues.
** The author doesn't want to distrupt the show's {{status quo|IsGod}}.
* '''Lampshaded''': "AllTheGoodMenAreGay."
* '''Invoked''': Alice asks Bob out; he replies, "SorryImGay."
* '''Exploited''': Bob is in denial about his sexuality, so Diane needs to put him in a situation where he will realize he doesn't like women in order to get him to date Charles.
* '''Defied''': Alice avoids men who aren't straight or bi to make sure this won't occur.
* '''Discussed''': "Don't feel bad that Bob doesn't like you; maybe he just doesn't like women."
* '''Conversed''': "Poor Alice, doesn't even realize that Bob is gay..."
* '''Implied''': Alice tries to seduce Bob, who's more interested in the negligee she's wearing than the one wearing it, as he asks her what it's made of and where he can get the same materials. He'd also much rather talk about how much he loves the seductive music she's put on, and how big a fan he is of the artist in question. Alice can't believe he's missing her cues all evening, so she never clarifies what she really wants from him; she's so stunned at all the things they ended up doing instead of making love that when he leaves, she still can't bring herself to make him stay, nor does it really dawn on her what the problem might be.
* '''Deconstructed''': Alice doesn't believe Bob is actually gay, and thinks that he simply doesn't want to be with her. Alice, hopelessly in love with Bob, either becomes depressed or deeply jealous of Charles.
* '''Reconstructed''':
** Alice realizes that her love will never come true and it's not Bob's or Charles's fault, so she instead becomes great friends with them.
** While Marie doesn't love Alice back, she was still her ClosetKey; while the rejection hurt, Alice now knows that she's more sexually fluid than she previously thought.
* '''Played For Laughs''':
** Alice is a ButtMonkey who never falls in love with a man who likes women.
** To make her an even bigger Butt Monkey, they all ''used to'' like women... [[LastHetRomance until they dated Alice]]. Bonus points if they all went from being hyper-manly to being extremely CampGay.
* '''Played For Drama''':
** Alice is heartbroken that her true love isn't capable of loving her back, and is so emotionally crushed that she swears never to love again.
** Marie's GayBravado with Alice results in her actually developing feelings for Marie; when she admits this, both women end up heartbroken -- Alice for being rejected, and Marie for realizing she has been accidentally giving Alice false signals.
* '''Played For Horror''': [[IfICantHaveYou Alice brutally tortures and kills Bob]] for not returning the feelings toward her.
----
Back to IncompatibleOrientation.
----
%% Optional items, added after Conversed, at your discretion:
%%
%%* '''Plotted A Good Waste''': ???